// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

#ifndef EQEXTERNALMULTIPLEXER_H
#define EQEXTERNALMULTIPLEXER_H

#ifdef __linux__
#include <sys/epoll.h>
#endif
#include <rdma/fi_cm.h>
#include <unistd.h>

#include <mutex>

#include <unordered_map>

class MsgStack;
class MsgConnection;

class ExternalEqDemultiplexer {
 public:
  ExternalEqDemultiplexer(MsgStack*);
  ~ExternalEqDemultiplexer();
  int init();
  int wait_event(fi_info**, fid_eq**, MsgConnection**);
  int add_event(fid_eq*);
  int delete_event(fid_eq*);

 private:
  MsgStack* stack;
  std::mutex mtx;
#ifdef __linux__
  struct epoll_event event;
  int epfd;
  fid_fabric* fabric;
#endif

  std::unordered_map<fid*, fid_eq*> fid_map;
};

#endif
